elaine



I.' R. BLAINE. PRINTING PRESS TRIPPING MECHANISM.

` Patented May 4,1920,

6 SHEETS-SHEET I.

APPLICATION FILED APR. 22, 1916.

' @5665.' Inv/@MZWI www J, R.VBLAINE. Pmmme PRESS TmPPlNG MEcHAmsM.

APPLICATIDN FILED APR-22,1916.

Patented May 4, 1920.

6 SHEETS-SHEET 2.

J. R. BLAINE.

PRINTING PRESS THIPPING MECHANISM. APPLICATloN man APR.22,1916.

1,339,31 6 Patented May 4, 1920.

6 SHEETS-SHEET 3.

J. R. BLAINE.

PRINTING PRESS TRIPPING MEJHANlSM.

APPLxcATloN rufo APR.22,1916.

Patented May 4, 1920.

6 SHEETS-SHEET 4.

J. R. BLAINE.

PRINTING PRESS TRIPPING MECHANISM.

APPLICATION FlLED APR.22.19|6.

1,839,316. Patented May 4, 1920.

, s SHEETS-SHEET 5.

I. R. BLAlNE.

PRINTING PRESS TRIPPING MECHANISM.

6 SHEETSMSHEET 6.

APPLICATlON FILED APR. 22, 1916. 1,339,3v l 6. Patented May 4, 192.

UNITED sTATEs PATENT oEEroE.

JOSEPH R. BLAINE, OF OAK PARK, ILLINOIS,IASSIGNOR TO MIEHLE PRINTINGPRESS 4 & MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OFILLI- N OIS.

PRINTING-PRESS TRIPPING MECHANISM.

Patented May 4, 1920.

Application mea April 22, 191s. serial No. 92,819.

To all who/1L 4it may concern-f y Be it known that I, JOSEPH R. BLAINE,a citizen of the United States, residing at Oak Park, in the county ofCook and State of Illinois, have invented certain new and use-. fulImprovements in Printing-Press Trip` ping Mechanism, of which thefollowing is a specification.

The object of the invention is the provision of compact, simple andefficient tripping mechanism for an offset press, adapted to theoperation of the same alternatively as a single or double revolutionpress, including mechanism for moving the blanket cylinder out ofoperative contact with both the form and impression cylinders, also formoving the impression cylinder out of contact with the blanket cylinderand also for moving the form `rollers away from the plate or formcylinder.

ln order that the invention may be read# ily understood a preferredembodiment of the same in one form or convertible single and doublerevolution offset press is s et Jr'orth in the accompanying drawingsandin the following detailed description based thereon.

constructional forms to adapt the same to the circumstances of use,wherefore it will be understood that the description and drawings are tobe taken -in anillustrative rather than in an unnecessarily .limitingSense.

Fig. 6 is a diagrammatic view showingparticularly the tripping mechanismfor the form rollers; and

Fig. 7 is a detail plan View of certain of the elements shown in Fig. 6.

In the drawings is shown a press equipped with the tripping mechanismforming the Obviously `the invention is susceptible of embodiment .inother and varied.l

` subject matter of this application, the press The driving mechanismand other details of construction having nothing to do with the presentinventlon are not herein shown.

Blanket cylinder trip, single revolution.

For the purpose of tripping the blanket cylinder out of operativecontact with both the form cylinder and the impression cylinder, theblanket cylinder has its bearings in bearing blocks eccentricallymounted. This eccentric bearing is indicated at 16 (Figs. 1 and 4) 'andis connected by means of the rod 17 with an arm 18 fixed upon the shaft19. The shaft 19 also has fastened thereon an arm 20 with a latch plate21. An arm 22 is loosely pivoted upon the shaft 19 and in turn haspivoted thereto at 23 a latch 24, the purpose of which will be shortlydescribed. The cam groove 25 is formed on the end of the blanketcylinder 12 for traverse by a rollerv26 carried by onev arm 27 of anangle lever fulcrumed at 28 and hav- `ing another arm 29 pivoted at 30to a link 31 connected to the arm 22, which is loose onthe shaft 19.

The latch 24 is pivoted at 23 to the arm 22 and overlies the latch plate21 projecting from the fast arm 20 but is held out of engagementtherewith normally by means of a Cam faced arm 32 pivoted at 33 andhav-v ing an arm 34 extending at an angle and pivoted at 35 to onemember of the toggle lever 36, 37.V The member 37 of the toggle ismounted on the rock shaft 38 from which an arm39 angularl'y extendsprovided' with a lug 40.

The toggle 36, '37 is straightened or broken in either direction bymeans of a.

link 41 connected at 42 to thev toggle joint and at'43 to a treadle 44fulcrumed at 45.`

For convenience of access a duplicate treadle 44n is provided at theopposite side ofthe press and is operatively connected with the treadle44 by means of the link 46. The two treadles 44 and 4 4a are normallyheld yieldingly in their elevated position by means of` the rod 47guided in the bracket 48 and under the control of the spring 49.

It is well understood that in mechanism of this character it isessential that the tripping of the cylinders shall take place only atcertain stages of the passage of a sheet through the press, and in orderto insure this the impresson cylinder 13 is provided with a cam groove5() traversed by a cam roller 51 carried by one arm 52 of a bell cranklever fulcrumed at 53, the other arm 54 of which is connected by meansof a link with an arm 56 pivoted at 57, which arm 56 is provided with a.stop 58. The stop 58 during the dwell of the cam is in the path of thelug 40 carried by the arm 39 and is only removed therefrom when theroller 51 reaches the high point of the cam as indicated in Fig. 4, atwhich time it is permissible to trip the blanket cylinder. It will beobserved that upon the point 57 is also pivoted another arm 59 bearing astop 60 which is normally interposed in the path of the lug 40 carriedby the arm 39 and consequently serves to limit the rearward movement ofthe arm 39 and lug 40 to a point just clear of the stop 58.' This arm 59is connected .by means of a link 61 with a lever 62, fulcrumed at 63 andcarrying a cam roll 64 which travels in the cam groove 50.

Let us assume that, operating as a single revolution offset press, itbecomes necessary to trip the blanket cylinder 12 by reason of a mis-fedsheet or other temporary contingency. The operator steps upon thetreadle 44 or 44a which brings the lug 4() against the stop 58. As soonas the cam roll 51 reaches the position indicated in Fig. 4 the stop 58will be withdrawn out of the path of the lug 40 and the arm 39 can moveto a position with its lug 40 in contact with the stop 6() and behindthe stop 58. Concurrently therewith the toggle 36, 37 is straightenedand the arm 32 is lowered to permit the latch 24 to engage with thelatch plate 21 of the arm 20 which is fast on the shaft 19, thuscoupling the arm 22 which reciprocates with the link 31 at everyrevolution of the press, to the arm 20 fast on the shaft 19. Thereafterthe shaft 19 partakes of the motion of the arm 22 imparted by means ofthe cam roller 26 traversing the groove 25. the shaft 19 is angularlyshifted and. acting through the arm 18 and the rod 17 upon the eccentric16, trips the blanket cylinder 12 out of contact with the plate cylinder11 and the impression cvlinder 13. This tripped relation of the blanketcylinder may be maintained throughout successive revolutions of thepress cylinders if the operator keeps his foot'upon the treadle 44. Tncircumstances such as those assumed. however. the operator willimmediately remove his foot from the treadle 44 and the arm 39 will heheld in tripped position by means of the stop 58 which will have droppedin front of the lug 40. When the impression cylinder 13 shall have madeone revolution, and the cam roller 51 has `reached again the positionshown in Fig.

4, the stop 58 will be removed out of the path of the lug 40 permittingthe spring 49 to raise the treadle and restore the parts of themechanism to the position shown in said ligure, whereupon the latch 24will have disengaged from the latch plate 21 and the cylinder 12 will bereturned to its printing relation with the other cylinders.

Occasions arise when it is desirable to maintain the blanket cylinderout of contact relation with the other cylinders throughout successiverevolutions as for instance, when prcliminarily inking the form or platecylinder 11, making it advantageous to disconnect the tripping mechanismat the parts 21, 24 so that the blanket cylinder 12 will remain trippedinstead of successively tripping at each revolution of the cylinder aswould be the case if the treadle 44 were held down in the positionpreviously indicated.

This is accomplished in the manner following: Having depressed the lever44 and straightened the toggle 36, 37 in the manner previouslyindicated, bringing the lug 4() against the stop 60, the operatorcontinues his pressure upon the treadle 44 until the ram roll 64 reachesthe high point of the cam groove 5() corresponding to that occupied inFig. `4 by the cani roller 51. At this time the stop 6() is lifted outof the path of V.the lug 40 and the arm 39 can move still farther to theleft to a position with the lug 40 beyond the stop 60, again breakingthe toggle 36, 37 but in the opposite. direction, releasing theconnection between the latch 24 and the latch plate 21 while thecylinder 12 is in tripped position. The latch 65 may then be broughtinto place to hold the treadle in this extreme positionso that the arm39 cannot again swing to the right upon the removal of the stops 60 and58 at each revolution of the cylinder. Under these conditions. theblanket cylinder 12 will remain out of contact with the cylinder 11 and13 until the latch 65 is released and the arm 39 allowed to move to theposition shown in Fig. 4 through suc.- cessive stages by the withdrawalof` the stops 60 and 58.

Blanket (2y/Under fri/. (Zou/ble revolution.

lVhen operating as a double revolution press. it will be understood thatthe time of tripping must accord with the double revolution. instead ofthe single revolution as under the conditions previously described. Allthe parts of the mechanism previously referred to by reference numeralsare employed when running as a double revolution press which areincluded between numerals 16 and 58 inclusive with the exception of thearm 34, cam arm 32 and the pivot 35. Wheii changing to a doublerevolutionv press the arm 36 of the toggle lever is disconnected fromthe arm 34 at the pivotal point 35 and is instead connected at 35a (Fig.5) to an arm 66 lof an angle lever fulcrumed at 67, the other arm 68 ofsaid lever being provided with a projecting nose 69. Operating as adouble revolution press, the arm 34 is substituted by the arm 34a to theupper end of which at 70 is pivoted the arm 71 carrying a cam roll 72which bears upon the cam 73, the latter being driven so as to make onerevolution to each two revolutions of the respective cylinders 11, l2and 13. Having fixed relation to the arm 71 is an arm 74, having at itslower end a hooked projection 75. p y

Running normally, the two-armed lever 71, 74 is essentially integralwith arm 34a since the projection 69 of arm 68 holds arm 74Vthrough itsvprojection 75 at the point of oscillation. This allows cam arm 32El withits arm 34, through arms 71, 74 to raise and lower latch 24 successivelyfor printing and tripped revolutions under the influence of cam 73against which the roll72 is held by spring 76. The printing revolutionobtains when latch 24. is disconnected and cam roller 72 is on the highpart of cam 73, while the tripped revolution obtains when cam roller 72is on low part of cam 73. To trip for a mis-fed sheet, the latch 24 mustremain in the connected position during the printing revolution whichunder normal conditions obtains with cam roller 72 on high part of cam73. In other words the cam roller 72must not act to raise latch 24during the printing revolution. This condition is brought about y by theprojecting nose 69 on arm 68 moving down out of the path of projection75 on le ver 71. 74, allowing the latter 71, 74, to oscillate freelyabout its center 7 0 on arm 34a.

Suppose it is desired to trip the blanket cylinder, the operator stepsupon the treadle 44 straightening the toggle 36, 37 to a certain extentwhereby the projecting nose 69 of the arm'68 is lowered out of the pathofv the hooked projection 75 of the arm 74 thus effecting an uncouplingof the lever 71, 74 with the arm 34i and allowing the cam arm 32a toremain in thelower position .so as to permit the latch 24 to stay inengagement with the plate 21 and utilize the reciprocatory motion of thelink 31 to trip the cylinder 12 in the manner previously described. Thiscan only be done, as in the previous case, when the stop 58 is liftedout of the path of the lug 40 by the cam roll 51 having reached itsproper position, the stop 58 then dropping in front l'of the lug 40 tohold it in tripped position until the next revolution of the cylinder13, at which time the lug 58 will be lifted, the arm 39 allowed to moveto the right, and the members 68, 74 coupled so as to disconnect thelatch 24 from theplate 21 i at the proper time for the printingrevolution to begin and allowing the cylinder 12 to remain in operatingcontact with the cylinders 11-and 13.

Impression cylinder trip.

In order to permit the impression cylinder 13 to be tripped from contactwith the blanket cylinder 12 while the latter is in contact with platecylinder 11 as for instance when inking up the blanket, the bearingblocks of cylinder 13 are 'arranged to move laterally under the iniuenceof an eccentric 77 controlled by an arm 78 connected by a link 79 with alever 80 fulcrumed at 81. By grasping the handle of the lever 8() theoperator is able to shift the eccentric arm 78 and thereby move theimpressioncylinder 13 bodily away from the blanket cylinder 12.

I nie roller trip.

- are mounted in slotted bearings-on `a rigid frame so as to besusceptible of movement relative to said 'frame in 'a direction tangentto the innermost rider rolls 84, 85. The shafts 89, 89EL carry arms 90,91, gearedvby means of teeth to the trip bars 92, 93 and opposite thesaid toothed gearing isv a similar gearing connecting the arm 94, 95, ofbell crank levers fulcrumed at 96, 97 and having arms 98, 99 arranged toact upon the under beveled surface of ,the frames 86, 88 pivoted at 87,87a and bearing at their free ends upon the spindles of the form rolls82,83 next adjacent each other, whereby these two rolls may be moved aspreviously-described. The remaining golls 82, 83 are moved with frames86, 88 away from the cylinder in substan tially radial directions.

lBy reason of the `fact that the angular area of the plate or formcylinder contacting at any one time with the form rollers 82, 83

. is only slightly less than the gap in said cylinder indicated at 104,it is necessary that these two sets of inkziollers be tripped insuccession rather than simultaneously. It is also necessary, in order toeffect a tripping of these rolls when and only when the gap is beneaththe same, that the tripping impulse-be stored up and utilized initsaction upon the ink vrolls at the proper moment.

To effect this result the following mechanism is employed: Upon theshaft 19 is fixed an additional arm 105 pivoted at 106 to a link 107connected at 108 to the arm 109 of a bell crank lever fulcrumed at 110,the other arm 111 of which is pivoted at 112 to a block 113 mounted upona storage bar 114 which has secured thereto at 115 the lower end of therod 92. vThe block 113 is slidable upon the rod .114 and has interposedbetween it and lock nuts 116 on said rod a compression spring 117. yUpon the other side of the block 113 is arranged a compression spring118 which bears `with its opposite end upon a nut 119. Upon the rod 114is likewise mounted at one side thereof a block 120 slidable upon asecond bar 121 and bearing at one side upon a compression spring 122which abuts against the lock nut 123 and at the other side upon acompression spring 124, which abuts against a lock nut 125, the oppositeend of the bar 121 being connected at 126 to the trip bar 93.

At the end of the plate or form cylinder 11 is arranged a cam groove 127traversed by two cam rollers 128, and 129, the former carried by the arm130 of a bell crank lever fulcrumed at 131 and carrying by its other arm132 a roller 133, while the other cam roll 129 is carried by the arm 134of a bell crank lever fulcrumed at 135 and carrying by its other arm 136a roller 137. The trip bar 92 has upon its outer edge a recess 138adapted to receive the roller 133 while the bar 93 has upon its innerface a similar recess 139 for the reception of the roller 137. These twotrip bars 92, 93 are provided respectively with lugs 140, 141 arrangedto coact with lugs 142, 143 upon the frame.

Upon the tripping of the blanket cylinder in the manner previouslydescribed, whether acting as a single or double revolution press, theangular shifting of the shaft 19 to shift the blanket cylinder will atthe same time by means of the arm 105 lower the link 107 and therebytend to move the bar 114 to the left. The movement of the bar isresisted by the roller 33 bearing against the lower end of the bar 92and consequently the spring 117 is compressed. At a time correspondingto the passage of the gap 104 beneath the form rollers 82 the cam roller128 will have reached the high point of the cam 127 and the roller 133will be lifted to a position in line with the recess 138, whereupon thelower end of the bar 92 will move to the left relieving the pressure onthe spring 117 and permitting the same to again expand. The entering ofthe cam roller 128 onto the low part of the cam 127 will pull down thebar 92 and, connected by the gearing at its upper end, will swing theform roller frames upwardly upon their hinge 87, thus tripping the setof form rolls 82.

At the moment the roller 133 is in line of bar 93 tends to move to theleft also but this movement is resisted by roller 137 on lever 136bearing on edge of bar 93. Consequently the movement of bar 114 to theleft compresses spring 122, which is much lighter than spring 117, andnot until roll 129 reaches the high part of cam 127 will the roller 137on arm 136 come in line with recess 139 and allow the spring 122 toforce bar 93 to the left. The entering of cam roller 129 onto the lowpart of cam 127 will pull down bar 93 thus tripping the set of formrolls 83.

When, upon the next revolution of th cylinders, the tripping mechanismis released at 40, 58, as previously described, the link 107 will bemoved upwardl and its force stored reversely within the springs 118 andslightly later in 124. By virtue of the fact that the movement of bars92, 93 is resisted by lugs 140, 141 being in contact with rigid stops142, 143 and not until roller 133 raises bar 92 to its highest positionwill the spring 118 be free to move bar 114 to the right disconnectingbar 92 from operating cam 127. The movement of bar 114 to the rightcompresses spring 124 (which is much lighter than spring 118) since thelug 141 on bar 93 is in contact with rigid stop 143. Then as roller 137moves bar 93 up to its highest position lug 141 moves out of the path ofstop 143 and spring 124 is free to move bar 93 to the right therebydisconnectlng form roll set 83 and mechanism will be in position shownin Fig. 6.

Provision is made for the manual llfting of all of the form rolls by thehand lever 145 loosely pivoted on the cross shaft 89a and connected by alink 146 with an arm 147 vof the cam 148 and by a link 149 with an arm150 of a cam 151, said cams operatlng to raise roller frames 86, 88 andby a link 152 with an arm 153 on a cross shaft 154 connecting to similararms and links on opposite side of press whereby the form roller framesare lifted bodily and in unison independently of the automatic meanspreviously described.

When starting up a press of this type it is necessary to ink up theplate while the blanket cylinder 12 is out of contact with it, 11e. whenthe blanket cylinder is in the tripped position. Normally the trippedposition of the blanket cylinder automatically trips the form rolls aspreviously described and in order to ink up the plate it is necessary-toneutralize the automatic roll trip mechanism. This is done in thefollowing manner: Hand lever 155 is fastened to a shaft 156 about whosecenter it pivots. Lever 157 also fastened to shaft 156 has a stud 158extending laterally and in the path of a slot 159 in bar 114. lVith theblanket cylinder in the tripped position bar 114 automatically movestothe left connecting up mechanism previously described to raise theform rvolls. Byl throwing lever 155 upward to the right approximately90o stud 158 moves about pivot 156 and contacts with the right inneredge of slot 159 acting as a stop to prevent bar 114 from moving to theleft. This causes the movement of bell crank arm 111 to compress spring117 but effecting no movement of bars 92, 93 by cam rolls 127 and 128.Thus the form -rolls are not raised from contact with the plate surface.

Aumz'lvarg/ delivery control.

I over the stud 161 and lock the lever arm 29 and the link bar 163together. The opposite end of the link bar 163 is pivoted at 166 to anarm 167 connected to the eccentric shaft 168 which acts upon thebearings of the auxiliary cylinder 15 to move the same bodily toward andfrom the impression cylinder 13. An arm 169 extending beyond theeccentric 168 has a lateral cam face adapted to bear against the studpin 170 and project the same into the path of the grippers 171 carriedby the impression cylinder.

- .A leverv 172 fastened to eccentric shaft 168 has a slide link 173pivotedat 174and sliding in 175. Link 176 is connected at l 177 to 173at one end and to 178 on cam 179 at the other end, which ,cam is in thepath of the gripper operatingf lever 180.-

The operation is as follows: If the press man desires to inspect7V asheet upon the table 160 he pulls the hand lever 181 and thereby dropsthe latch 165 into engagement i with the stud 161 causing the link bar163 to partake of the motion of the lever arm 29 shifting the eccentricshaft 168 to bring the auxiliary cylinder 15 into operative engagementwith the impression cylinder 13 andpermit the grippers 182 to take thesheet therefrom, the stud pin/*170 having 1. The combination with theplate, blan-I ket and impression cylinders of a printing press, of meansfor tripping the blanket cylinder, an oscillatory member driven inunison with the blanket cylinder and controlling the tripped position inone direction and the printing position in the opposite direction, areleasable connection between the oscillatory member and the trippingmeans, manually operable means to engage and disengage the saidconnection, andmeans under the control of the impression cylinder todetermine the time at which the engaging and disengagingmay be effectedin either the tripped 0r printing position .of the blanket cylinder. 2.The combination with the plate, blanket and impression cylinders of aprinting press, of means for tripping the blanket cylinder comprising aneccentric bearing therefor, an oscillatory me ber driven in unison withthe blanket cyli der, a releasable connection between the oscillatorymember and the eccentric bearing, means manually operable in onedirection to'engage and in the opposite direction to disengage the saidconnection, andi means under the control of the impression cylinder todetermine the time at which the engaging and disengaging may be effectedin either the tripped or the printing position of the blanket cylinder.

3. The combination with the plate, blanket and impression cylinders of aprinting press, of means for tripping the blanket cylinder comprising aneccentric bearing for said cylinder, a rock shaft, a rod eccentricallyconnecting the bearing and shaft, an arm loose on the shaft, a camactuated in unison with the blanket cylinder, a driving connectionbetween the cam and loose larm whereby to oscillate the latter,a latchfor optionally coupling the arm and shaft, a cam actuated in unison withthe impression cylinder, manually operable means to actuate the latch tocouple and uncouple the arm and shaft, and means actuated by thevimpression cylinder cam to control the time at which the'manuallyoperable means mayl eHect the coupling by means of the latch.

4. The combination with the plate, blanket and impression cylinders of aprinting press, ofmeansfor trippingthe blanket cylinder comprising aneccentric bearing for said cylinder, a rock 'shaft having an arm fixedthereon, a rod connecting the bearing and fixed-arm, an arm loose on theshaft, a cam actuated in unison With the blanket cylinder, a drivingconnection between the cam and the loose arm whereby to oscillate thelatter, a latch for optionally coupling the loose and fast arm, a camactuated in unison with the impression cylinder, manually operable meansto engage and disengage the latch to couple and uncouple the arms, andmeans actuated by the impression cylinder cam to control the time atwhich the manually operable means may effect the coupling of the arm bymeans of the latch.

5. The combination with the plate, blanket and impression cylinders of aprinting press, of means for tripping the blanket cylinder comprising aneccentric bearing for said cylinder, a rock shaft, a rod eccentricall)7connecting the bearing and shaft, an arm loose on the shaft, a camactuated by the blanket cylinder, a driving connection between the camand loose arm whereby to oscillate the latter, a latch for optionallycoupling the loose arm and shaft, a detent arranged to normally hold thelatch disengaged with the arm and shaft in uncoupled position, a toggleconnected to the detent, manually ope able means to straighten and breakthe toggle, an arm moving with the toggle, a cam actuated by theimpression cylinder, a stop moved by said cam into and out of the pathof the toggle arm to control the time at which the manually operablemeans may eii'ect a straightening of the toggle to withdraw the detent,said stop moving behind the armto maintain the detent in withdrawncondition during a single revolution of the impression cylinder, and a.manually controlled catch to maintain the toggle. with the latch indisengaged position independent of the impression cylinder' cam.

6. The combination with the plate,blanket and impression cylinders of aprinting press, of means for tripping the blanket cylinder comprising aneccentric bearing for said cylinder, a rock shaft having an arm fixedthereon, a rod connecting the bearing and arm, an arm loose on theshaft, a cam actuated by the blanket cylinder, a driving connectionbetween the cam and loose arm whereby to oscillate the latter, a latchfor optionally coupling the loose and fast arms, a detent arranged tonormally hold the latch disengaged with the loose and fast arms inuncoupled position, a toggle connected to the detent, manually operablemeans to straighten and break the toggle in both directions, an armmoving with the toggle, al

cam actuated by the impression cylin( er, a stop moved by said cam intoand out of the path of the toggle arm to control the time at which themanually operable means may' eHect a straightening of the toggle towithdraw the detent, said stop moving to a position behind the arm tomaintain the detent in withdrawn condition during a single revolution ofthe impression cylinder, a second stop also moved by said impressioncylinder cam to limit the straightening movement, of the toggle in oneposition of the cam and in another position thereof to permit thebreaking of the toggle in the opposite direction and to engage behindthe arm whereby to disengage the latch in the tripped position of theblanket cylinder and to maintain the same in disengaged position duringa single revolution of said cylinder, and a manually controlled catch tomaintain the toggle with the latch in disengaged position independent ofthe impression cylinder cam.

T. The combination withl the plate, blanket and impression cylinders ofa printing press, of blanket cylinder tripping mechanism, operatingmechanism moving in timed relation to the blanket cylinder, couplingmechanism comprising normally disconnected parts, one of said partsconstantly moving in each alternate revolution of the impressioncylinder, manually operated means for connecting the parts of thecoupling mechanism whereby to render said coupling mechanism effectiveto disengage and reengage the operating and tripping mechanism, andmeans actuated in timed relation to the cylinders to control the time atwhich the manually operable means may connect the elements of thecoupling mechanism.

S. The combination with the plate, blanket and impression cylinders of aprinting press, of means for tripping the blanket cylinder comprising aneccentric bearing for said cylinder, a rock shaft having an arm fixedthereon` a rod connecting the bearing and arm. an arm loose on theshaft, a cam actuated by the blanket cylinder. a driving connectionbetween the cam and loose arm whereby to operate the latter, a hitch foroptionally coupling the loose and fast arms, a cam member making onerevolution to each two revolutions of the blanket cylii'ider, a latchcoupling mechanism comprising a detent arranged to normally hold thehitch in uncoupled position, a cam actuated lever having one arm bearingon the last mentioned cam member and the other arm releasably connectedto the detent whereby at every second revolution of the press to permitthe engagement and disengagement of the latch, and means to connect the.detent and cam actuated lever, a toggle operatively connected to thecoupling mechanism to connect the detent and cam actuated lever,manually operable means to straighten and break the toggle, an armvmoving with the toggle, a cam actuated by the impression cylinder, astop movable by said cam into and out of the path of the toggle arm tocontrol the time at which the Ymanually operable means may effect a setsbeing removed from and resored intov contact with the form in the sameorder.

10. The combination with the plate cylinder of a printing press and theblanket cylinder, of tripping mechanism for the blanketcylinder operablein timed relation to the rotation of the said cylinder, of form inkingrollers arranged in a plurality of sets, and means for successivelytripping the sets of form inking rollers in isochronism with thetripping of the blanket cylinder at a predetermined interval of timethereafter.

11. The combination with the blanketand plate cylinders of a printingpress, frames mounted for movement toward and away from the platecylinder, a set of form inking rollers mounted in the frame, a trip barconnected to each frame and having a recess therein, a cam moving inunisonwith the cylinder, levers corresponding in number to vthe tripbars, one arm of eachlever traversing the cam, a projection carried bythe other arm of each lever adjacent a recess in a trip bar, primary andauxiliary impulse- `storage bars fast to the lower ends of the tripbars, a block slidable on each storage bar, an abutment spring on eachside of the block,.the storage bars secured together by means of theblock fast to one and slidable on the other, a'irock shaft having an armthereon, a connection between the rock arm and the sliding block of theprimary storage bar, a tripping connection vbetween the rock shaft andthe blanket cylinder, and meansv for rocking said shaft to trip theblanket cylinder, whereby as the blanket4 cylinder is tripped the setsof form rollers are automatically tripped in succession.

12. The combination with the blanket and ,plate cylinders of a printingpress, frames the trip* bars, one arm of each lever travers- ,ing-thecam, a projection carried bythe other arm of each lever adjacent arecess inI a trip bar, primary `and auxiliary impulsestorage barsfast'lto the lower ends of the trip bars, .a-.block slidable on eachstora e bar, an abutment spring oneach side of the block, the storagebars secured together byv means of the block fast to one and slidable onthe other, a level' having one arm attaclied to the sliding block of theprimary storage. bar, a 'ock shaft having an arm fixed thereon, a linkconnerting between the rock arm and lever` a tripping connection betweenthe rock shaft and 'the blanket cylinder, and means for rocking saidshaft tov trip the blanket cylinder', v'hereby as the blanket cylinderis tripped the sets of form rollers are automatically tripped insuccession and at a predetermined interval of time after the tripping ofthe blanket cylinder.

13. The combination with the blanket and the trip bars, onen arm of eachlever travers-A ng the cam, a projection carried by the other arm ofeach lever adjacent a recess in a trip bar, primary and auxiliaryimpulsestorage bars fast tothe lower ends of the trip bars, a blockslidable on each storage bar, an abutment spring on each side of theblock, the storage bars secured together by means of the block fastto-one and slidable inder, whereby as the blanket cylinder is trippedthe sets of form rollersare automatically tripped in succession, andmeans to manually trip the ink rollers independently of the blanketcylinder 'comprising cam members acting on roller frames, a hand lever,and link connections between the cams and hand lever.

14. The combination with the plate cylinder of aY printing press and theblanket cylinder, of tripping mechanism for the blanket cylinderoperable in timed relation to the rotation of the said cylinder, of forminking rollers arranged in a plurality of sets, means for successivelytripping the sets of form inking rollers in isochronism with thetripping of the blanket cylinder at a predetermined interval of timethereafter, and means to manually trip the ink rollers independently ofthe blanket cylinder.

15. The combination with the plate cylinder of a printing press and theblanket icylinder, of tripping mechanism for the blanket cylinderoperable in timed relation to the rotation of the said cylinder, of forminking rollers arranged in a plurality of sets, means for successivelytripping the sets of form inking rollers in isochromsm with the trippingof the blanket cylinder at a predetermined interval of time thereafter,and means to maintain the inking relation of the form rollers to y'theplate cylinder independently of the tripping of the blanket cylinder.

16. r1`he combination with the plate cylinder of a printing press andthe blanket cylinder, of tripping mechanism for the blanket cylinderoperable in timed relation to the rotation of the said cylinder, of forminking rollers arranged in a plurality of sets. means for successivelytripping the sets of form inking rollers in isochronism with thetripping of the blanket cylinder at a` predetermined interv-al of timethereafter, means to manually trip` the ink rollers independently of theblanket cylinder, and means to maintain the inking relation of the formrollers to the plate cylinder independently of thc tripping of theblanket cylinder.

l?. rlhe combination with the blanket and plate cylinders of a printingpress, frames mounted for movement toward and away from the platecylinder, a set of form inking rollers mounted in the frame, a trip barconnected to each frame and having a recess therein. a cam moving inunison with thel cylinder, levers corresponding in number to the tripbars, one arm of each lever traversing the cani, a projection carried bythe other arm of each lever adjacent a recess in a trip barr` primaryand auxiliary impulsestorage bars fast to the lower ends of the tripbars, a block slidable on each storage bar, an abutment spring on eachside of the block, the storage bars secured together by means of theblock fast to one and slidable on the other, a rock shaft having an armthereon, a connection between the rock arm and the sliding block of theprimary storage bar, a tripping connection between the rock shaft andthe blanket cylimier,v means for rocking said shaft to trip the. blanketcylinder, whereby as the blanket cylinder' is tripped the sets of formrollers are auto-- matically tripped in succession, and means tomaintain the lnking relation of the form of the tripping` of the blanketcylinder comprising a manually controlled member to prevent the movementof the primary storage bar under the impulse of the rock shaft.

18. The combination with the blanket and `plate cylinders of a printingpress, frames mounted for movement toward and away; from the plate`cylinder, a set of form inking rollers mounted in the frame, a trip barconnected to each frame and having a recess therein, a cam moving inunison with the cylinder, levers corresponding in number to the tripbars, one arm of each lever traversing the cam, a projection carried bythe other' arm of each. lever adjacent a recess in a trip bar, primaryand auxiliary impulsestorage bars fast to the lower ends of the tripbars, a block slidable on each storage bar, an abutment spring on eachside of the block, the storage bars secured together by means of theblock fast to one and slidable on the other, a rock shaft having an armthereon, a connection between the rock arm and the sliding block of theprimary storage bar, a tripping connection between the rock shaft andthe blanket cylinder, and means for rocking said shaft to trip theblanket cylinder, whereby as the blanket cylinder is tripped the sets offorming' rollers are automatically tripped in succession, means tomanually trip the ink rollers independently of the blanket cylindercomprising cam members acting on the roller frame, a hand lever, andlink connections between the cams and hand lever, and means to vmaintainthe inking relation of the form rollers -to the `plate cylinderindependently of the tripping of the blanket cylinder comprising amanually controlled stop member to prevent thev movement of the primarystorage bar under the impulse of the rock shaft.

In witness whereof I have hereunto signed my naine in the presence oftwo subscribing witnesses.

' JOSEPH R. BLAINE. litnesses ARTHUR G. JAoosoN, A. Gr. FISCHER.

